On 40th anniversary of ‘Back to the Future,’ Allstate celebrates its role in creation of DeLorean time machine

On the 40th anniversary of the “Back to the Future” movie premiere, Northbrook-based insurance giant Allstate is traveling back to the past to reveal its little-known role in developing the DeLorean, the futuristic but short-lived, gull-winged, stainless steel car that served as Doc Brown’s time…